There is no way you to unlock 5.12.01 on 3.1.3 unless you jailbreak it and downgrade it.. I want to help you on your iPhone but I'm not sure if the result will be succesful.
There is no way you to unlock 5.12.01 on 3.1.3 unless you jailbreak it and downgrade it..
I want to help you on your iPhone but I'm not sure if the result will be succesful.